Neal Stephenson's novel Cryptonomicon is excellent. I strongly recommend it to anyone who enjoys reading & is interested in crypto. Part of the plot involves a cipher that operates a bit like RC-4, permuting an array, but the array is a deck of cards. https://www.schneier.com/academic/solitaire/
Please don't. Solitaire is not a particularly well-designed cipher, in either the human factors sense or in the cryptographic strength sense. Even Schneier himself says it's mostly of interest only as a curiosity and not for serious purposes.
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